BBC AM7/13 Info Required

snod_donkey · Jun 29, 2013

I see there has been some previous requests for circuits and info on the BBC AM7/13 high gain modules.
I have just purchased a few modules and want to mod them for mic preamp use...... looking for any info on modding to add a fully variable gain pot rather than the fixed gain they are set with.

Anyone know what resistors set this gain?

Thanks

snod_donkey · Jul 2, 2013

BUMP

Anyone any info at all that might help?

topcat · Jul 2, 2013

Hi,

Have you tried
http://www.bbceng.info/Designs/dd_top.htm ?
found this reference there
"Marnix Bosman has found a complete rack carrying AM7/11, AM7/12 and AM7/13 units and he would like to get them going again. Therefore he is looking for the schematics or the pin layout and hopes there is somebody able to help.
Information provided via new arrangement with BBC (see next item below).
Further information offered by Mike Davis and Richard Barnes."

tc

mjrippe · Jul 2, 2013

Couldn't find that reference at that web address :-( Did I miss something?

topcat · Jul 3, 2013

oops... that's was my bookmark
I used; Home : Search: to get to
http://www.bbceng.info/info_exchange/resolved.htm

mjrippe · Jul 3, 2013

Ok, thanks! Been digging through the BBC R&D papers and monogaphs lately

http://www.bbc.co.uk/rd/publications

BBC AM7/13 Info Required

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BBC AM7/13 Info Required

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